My boyfriend (M25) won't tell his female friend (f24) to back off even though it's ruining our relationship?

We've been together 3 years. It's always her texting him things that are kind of inappropriate, like "I miss you so much. I miss the way we were." She also dislikes me because she never asks about me, never likes any of his pics with me in them, etc. She used to call him late at night (past midnight) and she thinks she's entitled to his time.

Recently he had told her that no matter what happens he will always answer her messages. However that caused a huge fight and now he decided he will just ignore her. She keeps texting him though and telling him he's being really shitty to her. He says he will ignore but refuses to tell her to nicely back off because he feels bad hurting her feelings.

/r/relationships Thread Parent